diff --git a/backend/services/reward-service/src/application/services/reward-application.service.ts b/backend/services/reward-service/src/application/services/reward-application.service.ts
index 6e67a143..1b61be41 100644
--- a/backend/services/reward-service/src/application/services/reward-application.service.ts
+++ b/backend/services/reward-service/src/application/services/reward-application.service.ts
@@ -12,6 +12,8 @@ import { Money } from '../../domain/value-objects/money.vo';
 import { Hashpower } from '../../domain/value-objects/hashpower.vo';
 import { EventPublisherService } from '../../infrastructure/kafka/event-publisher.service';
 import { WalletServiceClient } from '../../infrastructure/external/wallet-service/wallet-service.client';
+import { OutboxRepository, OutboxEventData } from '../../infrastructure/persistence/repositories/outbox.repository';
+import { RewardSummary } from '../../domain/aggregates/reward-summary/reward-summary.aggregate';
 
 // 总部社区账户ID
 const HEADQUARTERS_COMMUNITY_USER_ID = BigInt(1);
@@ -29,6 +31,7 @@ export class RewardApplicationService {
     private readonly rewardSummaryRepository: IRewardSummaryRepository,
     private readonly eventPublisher: EventPublisherService,
     private readonly walletService: WalletServiceClient,
+    private readonly outboxRepository: OutboxRepository,
   ) {}
 
   /**
@@ -49,8 +52,10 @@ export class RewardApplicationService {
     // 2. 保存奖励流水
     await this.rewardLedgerEntryRepository.saveAll(rewards);
 
-    // 3. 更新各用户的汇总数据
+    // 3. 更新各用户的汇总数据并收集需要同步到 wallet-service 的汇总
     const userIds = [...new Set(rewards.map(r => r.userId))];
+    const updatedSummaries: RewardSummary[] = [];
+
     for (const userId of userIds) {
       const userRewards = rewards.filter(r => r.userId === userId);
       const accountSequence = userRewards[0].accountSequence;
@@ -69,9 +74,13 @@ export class RewardApplicationService {
       }
 
       await this.rewardSummaryRepository.save(summary);
+      updatedSummaries.push(summary);
     }
 
-    // 4. 发布领域事件
+    // 4. 写入 Outbox 发送到 wallet-service 同步汇总数据
+    await this.publishSummaryUpdatesToOutbox(updatedSummaries);
+
+    // 5. 发布领域事件
     for (const reward of rewards) {
       await this.eventPublisher.publishAll(reward.domainEvents);
       reward.clearDomainEvents();
@@ -113,6 +122,11 @@ export class RewardApplicationService {
 
     await this.rewardSummaryRepository.save(summary);
 
+    // 写入 Outbox 同步到 wallet-service
+    if (claimedCount > 0) {
+      await this.publishSummaryUpdatesToOutbox([summary]);
+    }
+
     this.logger.log(`Claimed ${claimedCount} rewards for user ${userId}, total ${totalUsdtClaimed} USDT`);
 
     return { claimedCount, totalUsdtClaimed };
@@ -182,6 +196,9 @@ export class RewardApplicationService {
     if (summary) {
       summary.settle(Money.USDT(totalUsdt), Hashpower.create(totalHashpower));
       await this.rewardSummaryRepository.save(summary);
+
+      // 写入 Outbox 同步到 wallet-service
+      await this.publishSummaryUpdatesToOutbox([summary]);
     }
 
     this.logger.log(`Settled ${totalUsdt} USDT for accountSequence ${params.accountSequence}`);
@@ -223,6 +240,8 @@ export class RewardApplicationService {
     }
 
     // 更新每个用户的汇总数据
+    const updatedSummaries: RewardSummary[] = [];
+
     for (const [userId, rewards] of userRewardsMap) {
       const userIdBigInt = BigInt(userId);
       // 使用 userId 作为 accountSequence (过期任务中无法获取真实 accountSequence)
@@ -236,6 +255,7 @@ export class RewardApplicationService {
       }
 
       await this.rewardSummaryRepository.save(summary);
+      updatedSummaries.push(summary);
     }
 
     // 将过期奖励转入总部社区
@@ -245,6 +265,12 @@ export class RewardApplicationService {
       const totalHqHashpower = expiredRewards.reduce((sum, r) => sum + r.hashpowerAmount.value, 0);
       hqSummary.addSettleable(Money.USDT(totalHqUsdt), Hashpower.create(totalHqHashpower));
       await this.rewardSummaryRepository.save(hqSummary);
+      updatedSummaries.push(hqSummary);
+    }
+
+    // 写入 Outbox 同步到 wallet-service
+    if (updatedSummaries.length > 0) {
+      await this.publishSummaryUpdatesToOutbox(updatedSummaries);
     }
 
     this.logger.log(`Expired ${expiredRewards.length} rewards, total ${totalUsdtExpired} USDT`);
@@ -344,4 +370,38 @@ export class RewardApplicationService {
       memo: r.memo,
     }));
   }
+
+  /**
+   * 发布汇总更新到 Outbox（同步到 wallet-service）
+   */
+  private async publishSummaryUpdatesToOutbox(summaries: RewardSummary[]): Promise<void> {
+    if (summaries.length === 0) return;
+
+    const outboxEvents: OutboxEventData[] = summaries.map(summary => ({
+      eventType: 'reward.summary.updated',
+      topic: 'reward.summary.updated',
+      key: summary.accountSequence.toString(),
+      aggregateId: summary.accountSequence.toString(),
+      aggregateType: 'RewardSummary',
+      payload: {
+        accountSequence: summary.accountSequence.toString(),
+        userId: summary.userId.toString(),
+        pendingUsdt: summary.pendingUsdt.amount,
+        pendingHashpower: summary.pendingHashpower.value,
+        pendingExpireAt: summary.pendingExpireAt?.toISOString() || null,
+        settleableUsdt: summary.settleableUsdt.amount,
+        settleableHashpower: summary.settleableHashpower.value,
+        settledTotalUsdt: summary.settledTotalUsdt.amount,
+        settledTotalHashpower: summary.settledTotalHashpower.value,
+        expiredTotalUsdt: summary.expiredTotalUsdt.amount,
+        expiredTotalHashpower: summary.expiredTotalHashpower.value,
+      },
+    }));
+
+    await this.outboxRepository.saveEvents(outboxEvents);
+
+    this.logger.log(
+      `[OUTBOX] Published ${outboxEvents.length} reward.summary.updated events to outbox`,
+    );
+  }
 }